Steps to reproduce:
------------------------------------
1. Install `ai` and `contacts` modules
2. Create an automation rule on Contact model:
    * Trigger: On Creation
    * Action To Do: Execute AI Action
    * Add a server action tool with 'Create Next Activity' action
    * Set Activity User Type to Dynamic
    * Set User Field to a dotted path (e.g., user_ids or partner_id.user_id)
3. Create a contact with a linked user

Observation:
------------------------------------
The activity description in the toast message fails to retrieve the user when using dotted field paths

Issue:
------------------------------------
The direct field access `record[self.activity_user_field_name]` in `_ai_get_action_description` method doesn't support dotted paths like 'partner_id.user_id'. This causes the same issue as in the mail module where relational field chains cannot be traversed

Solution:
------------------------------------
Use `record.mapped()` to support dotted paths by traversing the relational chain, consistent with the fix applied to the mail module

opw-6191715
Related Community PR: https://github.com/odoo/odoo/pull/263530

Forward-Port-Of: odoo/enterprise#118921

In recent versions of PyPDF, modifying a `PageObject` directly from a `PdfFileReader` instance triggers a `PageObject.replace_contents` deprecation warning. As identified in the pypdf library's architecture updates (specifically PR #3638 [^1] and PR #3669 [^2]), a reader's page is intended to be read-only. Mutating it directly (e.g., using `mergePage` or `compressContentStreams`) before attaching it to a writer can break internal object references and cause `NullObject` errors.

This commit resolves the warning by inverting the order of operations to ensure we only mutate writable objects. The fix implements the following flow:
1. Add the unmodified source page directly to the `PdfFileWriter`.
2. Retrieve the newly created, writable output page.
3. Apply `mergePage` and `compressContentStreams` exclusively to the writer's copy of the page.

[^1]: https://github.com/py-pdf/pypdf/pull/3638
[^2]: https://github.com/py-pdf/pypdf/pull/3669

Forward-Port-Of: odoo/odoo#268865
Forward-Port-Of: odoo/odoo#267958

In recent versions of PyPDF, modifying a `PageObject` directly from a `PdfFileReader` instance triggers a `PageObject.replace_contents` deprecation warning. As identified in the pypdf library's architecture updates (specifically PR #3638 [^1] and PR #3669 [^2]), a reader's page is intended to be read-only. Mutating it directly (e.g., using `mergePage` or `compressContentStreams`) before attaching it to a writer can break internal object references and cause `NullObject` errors.

This commit resolves the warning by inverting the order of operations to ensure we only mutate writable objects. The fix implements the following flow:
1. Add the unmodified source page directly to the `PdfFileWriter`.
2. Retrieve the newly created, writable output page.
3. Apply `mergePage` and `compressContentStreams` exclusively to the writer's copy of the page.

[^1]: https://github.com/py-pdf/pypdf/pull/3638
[^2]: https://github.com/py-pdf/pypdf/pull/3669

Forward-Port-Of: odoo/enterprise#119694
Forward-Port-Of: odoo/enterprise#119239

When a calendar event has multiple attendees, `_get_contact_details_description` picks the first non-organizer partner from a set-based recordset to render under "Contact Details" in the event description. The recordset is built from `partner_ids_from_attendees`, a set whose iteration order depends on Python's hash seed, so the displayed contact is effectively random and not controllable from the UI.

Restrict the "Contact Details" block in `_get_contact_details_description` to events with exactly one non-organizer attendee (1-on-1 meetings). For group meetings the block is omitted entirely, since any single attendee picked from a larger group is arbitrary by construction.

Steps to reproduce:
1. Go to Calendar > New
2. Add 3+ attendees (e.g. Alice, Bob, Charlie)
3. Save the event
4. Check the Notes tab in the event form

=> One random attendee's contact info appears under "Contact Details"

Ticket [link](https://www.odoo.com/odoo/project.task/6035192)
opw-6035192

Forward-Port-Of: odoo/odoo#258901

[*]: html_builder

Issue:
When viewing a blog post, the "Next Post" section allows editing the cover image, title, and subtitle of another post. Editing content that belongs to a different post from within the current one is incorrect.

Steps to reproduce:
  * Open a blog post that has a "Next Post" section visible.
  * Enter edit mode.
  * Try to edit the cover image, title, or subtitle of the next post.
  * These elements can be interacted with even though they should not be
    editable.

Fix:
Make the "Next Post" section fully non-editable. The title and subtitle were already handled via content_not_editable_selectors, but the cover image could still activate builder options, allowing it to be replaced.

Introduce a new `not_activable_element_selectors` resource in the `BuilderOptionsPlugin` so that plugins can declare elements that should not trigger the builder overlay when clicked. Updated the builder to retrieve this selector list from plugin resources instead of using a hardcoded value.

task-5435878

Forward-Port-Of: odoo/odoo#265103
Forward-Port-Of: odoo/odoo#249815

Issue:
When the sales price is changed from the product variant form for a product without configured variants, the price is updated only on `product.product.lst_price`. The main product form, opened from Inventory > Products, displays `product.template.list_price`, which remains unchanged. The same issue is visible from Purchase Orders because the product internal link on a purchase order line opens `product.product`, while the product page opens `product.template`.

Steps to reproduce:
- Create or open a product without configured variants
- Open product variant form from the internal link in a purchase order
- Change the Sales Price on the product from there
- Open the product from Inventory > Products (`product.template`)
- The template Sales Price still shows the old value

Cause:
Since version 19.1, `product.product.lst_price` is an editable stored field, allowing variant-level prices to differ from the template price. This is correct for products with multiple variants, where each variant may have its own sales price. However, for products with only one variant (the product itself), no synchronization was performed from `product.product.lst_price` back to `product.template.list_price`, leaving both product forms inconsistent.

Solution:
- Add `_inverse_product_lst_price` on `product.product.lst_price` so that When `lst_price` is written and the template has exactly one variant, set `list_price` to `lst_price` (delegates to the template)

opw-6260015

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Forward-Port-Of: odoo/odoo#268017

Steps to reproduce:
1. Install website_sale_renting_planning
2. In rental module,  create a product that is of type service and can be sold
3. Go to the website and remove the quantity selector input field from the page and save.

Issue:
`TypeError: Cannot read properties of null (reading 'dataset')`

Why this happens:
Following architectural changes in v19.1, the rental data evaluation logic was moved directly into the DaterangePicker component lifecycle. Commit 4e5f71d introduces a new method to where, during initialization (`willStart`), the component triggers `setAddQtyInputMax()` to update the dataset attributes of the quantity selector input box. If the quantity selector has been removed via the website customizer `querySelector` returns `null`, causing the assignment to crash.
In v19.0, this logic lived in the `WebsiteSale` interaction, executing only during post-render UI event listener triggers which kept it safe.

opw-6268945

Forward-Port-Of: odoo/enterprise#119574

# How to reproduce
- Go into any form view of a model with a chatter (e.g. Quotation)
- Add multiple long log notes. You need to be able to scroll enough to not see the last log note
- Click edit on the last log note
- Scroll down to the bottom

# The problem
An empty rectangle is displayed next to the log note in edit mode.

# Cause
The rectangle comes from the NavigableList Component, which is the list that displays suggestions when typing things like "@" or "#" : https://github.com/odoo/odoo/blob/1fd44c3bb11a79d5b6aa72bf7de5a83e6c45be46/addons/mail/static/src/core/common/composer.xml#L137

This components uses the `usePostion()` hook, which purpose is to try to find the most appropriate place to put the element. It will try different postions (e.g. on the left, below, above, etc.) and will pick the most appropriate one. It will then adjust the element's style to position it correctly. It is possible to ask for a preferred position using the options given to the hook. This position will be prioritized over the others if it is suitable. In the case of the NavigableList of the chatter, we give it either 'bottom-fit' or the 'top-fit' positions, wich means it will prefer to be displayed above or below the message : https://github.com/odoo/odoo/blob/dd84309df7fd39e9e97ed02d135d25b211085135/addons/mail/static/src/core/common/composer.js#L449-L459

But in our case, when we scroll back up, the position of the rectangle stays on the left, even though the below space is available. That is because of this commit that introduced a memorization of the last solution :
https://github.com/odoo/odoo/commit/b2b8d2dbb8396d86492a3089db9b1b1545c8f13b https://github.com/odoo/odoo/blob/f2434aac74324a65ccd81aa18c7b0e8318e59fde/addons/web/static/src/core/position/position_hook.js#L59-L61

This means that when we scroll down, the bottom positions fails and so the left one is defaulted to. Since the position is memorized, it stays on the left. The issue with this left position is that another commit introduced some logic that made it so if the position is not "top" or "bottom", then we set the element's height to some value : https://github.com/odoo/odoo/commit/702748e2c8e895d372d07f9aeff273282d1b1a99 https://github.com/odoo/odoo/blob/f2434aac74324a65ccd81aa18c7b0e8318e59fde/addons/web/static/src/core/position/utils.js#L120-L124

And setting the height of the NavigableList makes it so it displayed even when there are no suggestions inside, because the hiding mechanism of the suggestion list relies on the fact that when there are no suggestions, the div is empty and has no height, so it is hidden.

# Propose solution
We introduce a settings in the options that will allow to skip the memorization of the last position. Since the left position will never be set in the options, no height will be defined.

opw-6172407

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Forward-Port-Of: odoo/odoo#262822